Objective To explore the optimal method for extracting human serum that retains rich growth factors.Methods Human serum was isolated by centrifugation of coagulated whole blood or by Anitua's method,and the concentrations of PDGF-AB and transforming growth factor-β1(TGF-β1) in the serum samples were measured.Human dermal fibroblasts were cultured in the presence of 10% feral bovine serum or 10% human serum obtained,and the cell morphology,viability and proliferative activity of the cells were evaluated.Resu...